Printrbot Play Small Spool Holder

This is a Remix of bgalbraith's design. I liked his design. However, I printed it and realized it needed to be out of a flexible material clip on. I redesigned so it could slide on with a rigid plastic and also so it can slide back to use standard rolls, so it never has to be removed when changing roll types. Just slide it back and pull out the rod. Actually you can leave the rod on and the large roll will still work when you slide the whole thing back.